King Diamond

Following the demise of the legendary
Mercyful Fate
in the mid-eighties, infamous frontman King Diamond decided to form
a new band named after himself, initially bringing two other MF
members with him.
The early King Diamond material was a continuation of the Mercyful
Fate sound, perhaps a bit more vocal-oriented and a bit less
thrashy, with lyrics focused on horror stories rather than the Satanic
overtones of Fate.
After a time Mercyful Fate reformed and King sang in both bands as the
two swapped priorities.
As of this writing (December 2014), MF is on hold and King is still
at it here.